diff --git a/contrib/notmuch-completion.zsh b/contrib/notmuch-completion.zsh
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+++ b/contrib/notmuch-completion.zsh
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+#compdef notmuch
+
+# ZSH completion for `notmuch`
+# Copyright © 2009 Ingmar Vanhassel <ingmar@exherbo.org>
+
+_notmuch_commands()
+{
+  local -a notmuch_commands
+  notmuch_commands=(
+    'setup:interactively set up notmuch for first use'
+    'new:find and import any new message to the database'
+    'search:search for messages matching the search terms, display matching threads as results'
+    'reply:constructs a reply template for a set of messages'
+    'show:show all messages matching the search terms'
+    'tag:add or remove tags for all messages matching the search terms'
+    'dump:creates a plain-text dump of the tags of each message'
+    'restore:restores the tags from the given file'
+    'help:show details on a command'
+  )
+
+  _describe -t command 'command' notmuch_commands
+}
+
+_notmuch_dump()
+{
+  _files
+}
+
+_notmuch_help_topics()
+{
+  local -a notmuch_help_topics
+  notmuch_help_topics=(
+    'search-terms:show common search-terms syntax'
+  )
+  _describe -t notmuch-help-topics 'topic' notmuch_help_topics
+}
+
+_notmuch_help()
+{
+  _alternative \
+    _notmuch_commands \
+    _notmuch_help_topics
+}
+
+_notmuch_restore()
+{
+  _files
+}
+
+_notmuch_search()
+{
+  _arguments -s : \
+    '--max-threads=[display only the first x threads from the search results]:number of threads to show: ' \
+    '--first=[omit the first x threads from the search results]:number of threads to omit: ' \
+    '--sort=[sort results]:sorting:((newest-first\:"reverse chronological order" oldest-first\:"chronological order"))'
+}
+
+_notmuch()
+{
+  if (( CURRENT > 2 )) ; then
+    local cmd=${words[2]}
+    curcontext="${curcontext%:*:*}:notmuch-$cmd"
+    (( CURRENT-- ))
+    shift words
+    _call_function ret _notmuch_$cmd
+    return ret
+  else
+    _notmuch_commands
+  fi
+}
+
+_notmuch "$@"
+
+# vim: set sw=2 sts=2 ts=2 et ft=zsh :